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Recent questions tagged diffraction

A slit of width 'a' is illuminated by white light. For what value of 'a' will the first minimum for red light of wavelength $\lambda =650 \;nm$ appear for $\theta =30^{\circ}$?

asked Jan 23, 2014 by meena.p

1 answer

What is the angular separation between two lines of $\lambda_1 =5882 \mathring{A}$ and $\lambda_2 =5852 \mathring{A}$ in first order grating with 6000 lines per cm in normal incidence.

asked Jan 23, 2014 by meena.p

1 answer

In a single slit experiment a wave of wavelength $0.2 \;cm$ is incident normally on a slit of width $0.004\;m$ . What is the semi angular width of the central maxima.

asked Jan 23, 2014 by meena.p

1 answer

The first diffraction minima due to a single diffraction is at $30^{\circ}$ for a light of wave length $5000A^{\circ}$ the width of slit is

asked Jan 23, 2014 by meena.p

1 answer

Light is incident normally on a diffraction grating through first order diffraction is seen at $32^{\circ}$ second order diffraction will be seen at

asked Jan 22, 2014 by meena.p

1 answer

Parallel beam of monochromatic light of wavelength $\lambda =4800 \mathring{A}$ is incident on a single slit of size $0.2 mm$ . The angular divergence in which most of light is diffracted is [ie between two 1st order maxima on both sides]

asked Jan 21, 2014 by meena.p

1 answer

In Fresnel bi prism experiment if prism angle $\alpha=1^{\circ}, \mu=1.54$ distance between prism and sources a is $0.3\;m$ and wave length $ \lambda= 180 \pi \;nm$ find the fringe width, distance between screen and prism $b= 0.7 \;m$

asked Jan 21, 2014 by meena.p

1 answer

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